What distinguishes the bulbar conjunctiva from the palpebral conjunctiva?

The bulbar conjunctiva is the membrane that covers the anterior surface of the sclera, which is the white part of the eye. This layer plays a crucial role in protecting the eyeball and providing a smooth surface for the movement of the eye. The palpebral conjunctiva, on the other hand, is the portion that lines the inner surface of the eyelids.

Understanding their anatomical locations helps clarify their functions and the distinctions between the two types of conjunctiva. The bulbar conjunctiva is a vital part of the eye's protective mechanism, assisting in lubrication and serving as a barrier against pathogens.

The other choices incorrectly attribute the locations or features of the conjunctiva. The palpebral conjunctiva does not cover the sclera, and suggesting either that it covers the eyelids or is more sensitive misses key attributes about their respective roles in ocular health.